3Com Router User Manual

							http://www.3com.com/
3Com Router 
Configuration Guide
Published March 2004 
Part No. 10014299 
						

							3Com Corporation 350 Campus Drive 
Marlborough, MA 
01752-3064
Copyright © 2004, 3Com Corporation. All rights reserved. No part of this documentation may be reproduced 
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If you are a United States government agency, then this documentation and the software described herein 
are provided to you subject to the following: 
All technical data and computer software are commercial in nature and developed solely at private expense. 
Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995) 
or
 as a “commercial item” as defined in FAR 2.101(a) and as such is provided with only such rights as are 
provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited 
rights only as provided in DFAR 252.227-7015 (Nov
 1995) or FAR 52.227-14 (June 1987), whichever is 
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associated. 
						

							GETTING STARTED 1
SYSTEM MANAGEMENT 33
INTERFACE 121
LINK LAYER PROTOCOL 183
NETWORK PROTOCOL 335
ROUTING 423
MULTICAST 517
SECURITY 543 
						

							VPN 615
RELIABILITY 665
QOS 681
DIAL-UP 721 
						

							ABOUT THIS GUIDE
This guide describes 3Com routers and how to configure them.
ConventionsTa b l e 1 and Ta b l e 2 list conventions that are used throughout this guide.
Ta b l e 1   Notice Icons
Ta b l e 2   Text Conventions
IconNotice TypeDescription
Information noteInformation that describes important features or 
instructions.
CautionInformation that alerts you to potential loss of data 
or potential damage to an application, system, or 
device.
WarningInformation that alerts you to potential personal 
injury.
ConventionDescription
Screen displaysThis typeface represents information as it appears on the screen.
Keyboard key namesIf you must press two or more keys simultaneously, the key names are 
linked with a plus sign (+), for example:
    Press Ctrl+Alt+Del 
The words “enter” 
and type”When you see the word “enter” in this guide, you must type 
something, and then press Return or Enter. Do not press Return or 
Enter when an instruction simply says “type.”
Words in italicsItalics are used to:
Emphasize a point.
Denote a new term at the place where it is defined in the text.
Identify command variables.
Identify menu names, menu commands, and software button names. 
Examples:
          From the Help menu, select Contents.
          Click OK.
Words in boldBoldface type is used to highlight command names.  For example, “Use 
the display user-interface command to...” 
						

							2ABOUT THIS GUIDE 
						

							I
GETTING STARTED
Chapter 13Com Router Introduction
Chapter 23Com Router User Interface 
						

							4 
						

							1
3COM ROUTER INTRODUCTION
This chapter includes information on the following topics:
■Overview of the 3Com Router System
■Architecture of the 3Com Router
■Features of the 3Com Router Version 1.10
■New Features of the 3Com Router 1.x
Overview of the 3Com 
Router SystemThe 3Com Router OS is the network operating system platform. With TCP/IP 
protocol stack as the core, the 3Com Router integrates data communication 
essentials such as routing technology, multicast technology, QoS technology, VPN 
technology, security technology in the operating system and provides excellent 
data transmission capability.
The 3Com Router can run on multiple hardware platforms with consistent 
network interface, user interface and management interface, providing flexible 
and multiple application solutions for users. 
This manual describes features and functions of the 3Com Router 1.x system 
software platform series of low end and middle range routers. In this manual the 
3Com Router is also referred to as the 3Com Router 1.x software version. You 
should make sure that the 3Com Router you use is operating with the software 
version documented in this manual. 
The software specification is different between various types of products. Product 
specification related matters should be confirmed with the 3Com Technical 
Support Department.
Architecture of the 
3Com Router With TCP/IP model as its reference, the 3Com Router implements data link layer, 
network layer, and application layer protocols, as per the architecture shown in the 
following diagram: 
						

							6CHAPTER 1: 3COM ROUTER INTRODUCTION
Figure 1   Schematic diagram of the 3Com Router architecture
Features of the 3Com 
Router Version 1.10 The following table lists the basic features of the 3Com Router 1.x:
Ta b l e 3   List of the 3Com Router 1.x features
System
service
TCP/UDP
IP forwarding engine
Fast
forwardingIP security
and firewallQoS
assurance
Route policy
management
RIP OSPF BGP
FTPHTTPTELNET
VPN
PPP/SLIP
Configuration
management
Voice Service
......
Command
line
SNMP
Web
management
HDLCEthernetX.25Frame Relay
AttributeDescription
Interconnection protocolLAN■Supports Ethernet_II and Ethernet_SNAP frame structure
■Follows IEEE 802.2 and IEEE 802.3 regulations
WAN■Supports Frame Relay and Frame Relay switching
■Supports FRoIP, FRoISDN
■Supports Multi-link Frame Relay (MFR), FR compression
■Supports FR Traffic Shaping (FRTS) to ensure even traffic over 
the VCs on FR
■Supports X.25 and X.25 switching, X.25 Over TCP (XOT)
■Supports HDLC, SDLC and LAPB regulations
■Supports SLIP, PPP and MP
■Supports PPPoE Client
■Supports ITU-T Q.921 and Q.931 regulations, ISDN (ITU-T 
Q.921, Q.931) and ISDN semi-permanent connection
■Supports bridging technology
Dial-up network■Manages Modem through the AT command and configures 
script to dial up. 
■Supports dial demand Routing (dialer profiles and legacy 
BDR)
■Supports Callback (PPP callback and ISDN Calling Line 
Identification callback)
■Provides ISDN leased line, automatic dialing, and cyclic dial 
queue backup
■Provides Dial interface backup
VPN■Supports L2TP, implements VPDN (Supports DNIS user, 
domain name user, and full name user)
■Supports L3 channel protocol GRE